Auxiliary strainer



Sept. 28, 1937; E, E, VOGT 2,094,286

AUXILIARY S TRAINER Filed June 17, 1956 Inven for Edgar E. l oyf y dwmflw Hiiorneys Patented Sept. 28,1937

UNITED STATES PATENT OFFICE 6 Claims.

My invention relates to a readily attachable and removable strainer for sinks having a holding device in the form of a resilient spike or pin which engages and grips in a perforation in any one of the perforations in the permanent strainer of the sink in the Waste outlet.

An object and feature of my invention is the construction of a separate strainer preferably made in the form of a disc and also preferably somewhat arched to form a flat dome with strainer perforations. The principal feature of my invention is in constructing this removable strainer with a resilient spike or pin attached to the underside of the strainer, this pin being adapted for insertion-in any one of the perforations of the permanent strainer to thereby form a resilient grip in such perforation and hold the auxiliary strainer in place. In this connection a further feature of my invention is forming the resilient spike or pin with a rigid pin element, preferably beveled at its lower end, this being partly surrounded by a resilient shroud, the shroud extending longitudinally-of the rigid pin and having normally a greater arc of curvature. The shroud is preferably attached to, the pin at a longitudinal line of contact, the side edges of the shroud being preferably tapered to a feather edge and the lower portion of the shroud having a bevel on its edges conforming to the bevel of the fixed pin. A characteristic of this assembly is that the fixed pin is much smaller than the diameter of the perforations in the fixed strainer and that the shroud is compressed as the spike assembly is inserted in a perforation, the shroud 35 becoming wrapped around the pin and by its tendency to expand, holds the removable strainer attache-d securely to the permanent strainer.

My invention is illustrated in connection with the accompanying drawing, in which:

Fig. 1 is a perspective View of a portion of a sink showing the upper side of my strainer with the handle.

Fig. 2 is a vertical diametrical section through my improved strainer and also through the permanent strainer and a portion of the sink at the waste pipe. Such section may be considered, so far as the removable strainer is concerned, as taken on the section line 22 of Fig. 3.

Fig. 3 is a plan of the removable strainer taken in the direction of the arrow 3 of Fig. 2.

Fig. 4 is an enlarged section similar to Fig. 2 of a portion of the permanent and removable strainer showing the resilient spike assembly attached to the removable strainer and in the initial position of being inserted in a perforation of the permanent strainer.

'Fig. 5 may be considered as a transverse section of Fig. 4 on the line 5-5, the permanent strainer being omitted.

Fig. 6 is a section on the line 6-6 of Fig. 2 in the direction of the arrows showing the shroud of the spike compressed and fitting a perforation of a permanent strainer.'

In my invention a portion of a sink is illustrated. by the numeral II, this having a bottom or floor l2 with an opening l3 in which is inserted a connecting collar l4 leading to a waste pipe, this also having a permanent strainer I5 with a plurality of perforations Hi. This construction is of the usual character.

My removable strainer designated by the assembly numeral 30, has a central solid portion 3!, a perforated section 32 and a marginal por-- tion 33, this terminating at the peripheral edge 34. Such edge is preferably beveled as indi cated at 35, being brought to a feather edge. At one side there is a handle 36 with a connecting portion 31 integral with the main portion of the strainer 23. domed so that the central portion 3! arches above the upper surface of the bottom or floor l2 of the sink, this being somewhat as shown in Figs. 1 and 2.

The resilient spike assembly 40 employs a solid 2,

pin 4! secured at 42 on the underside of the central solid portion 35 of the strainer 30. This pin is cylindrical, having its peripheral surface formed on the radius 43. The lower end is beveled as indicated at 44, thus forming a relatively sharp point 45 at one side of the lower end, having a gradual convex slope indicated at 46 merging with the side walls of the pin. The shroud. 41 is formed of a plate of metal bent into an arch and spaced at its upper end 48 from the underside of the central part 3| of the strainer. The shroud may be considered as having a central longitudinal portion 49 which on its inside surface contacts the pin with a longitudinal contact extending to the point end 45 and spot welded The strainer is preferably slightly The shroud has a point 53 at its lowermost portion, this preferably being formed as a continuation of the bevel 44 at the end of the pin and thus extending slightly below the pointed end 45 of the pin. The marginal edges 54 of the shroud which extend upwardly from the lower point 53 diverge and are also formed approximately on the same slope as the bevel M on the end of the pin. The edges at this section 54 are preferably brought to a feather edge.

In using a strainer made in accordance with my invention, the resilient spike assembly is inserted in any one of the perforations 16 of the permanent strainer 55, preferably at or adjacent one of the perforations in the center. The point 53 at the lower end of the shroud readily guides the spike assembly into this perforation as does the sloping portion 54 of the shroud and the bevel 5d of the pin. As this curved portion 54 of the shroud on each side engages the metal of the permanent strainer at the particular perforation in which the spike is inserted, the shroud is squeezed inwardly as shown in Fig. 6. This causes the shroud to be wrapped somewhat tight- 1y around the pin so that its vertical edges 5i approach each other. The detachable strainer may then be forced downwardly until the bevel 35 of its peripheral edge 34 has a close fit with the upper surface of the floor l2 of the sink. Then, due to the resiliency of the shroud which is under tension, tending to expand in the perforation [6 of the permanent strainer, the removable strainer is firmly held in place. Thus there is no danger in using a sink such as with a dishpan or in other ways of accidently displacing the removable strainer. Manifestly when this strainer becomes clogged and it is desired to clean both the removable and the permanent strainer, the device may readily be removed.

It is obvious that in some types of strainers it is not necessary that the pin 4! extend the full length of the shroud as it is only necessary that the shroud is made of suflicient strength to have the pin long enough to attach the shroud to the disc of the strainer. In fact, the device may be made by entirely omitting the pin GI and attaching the upper edge of the shroud to the underside of the strainer disc, then this shroud has sufiicient strength and resiliency so that the lower portion is compressed. This compression reduces the curvature of the arch of the normal expanded shroud or resilient strip to a lesser arch when the shroud, that is, the resilient strip is forced into the perforation of the permanent strainer. As it is only the lower portion of the shroud which engages in the perforation Hi, the upper portion of the shroud may be left without contraction.

Various changes may be made in the details of the construction without departing from the spirit or scope of the invention as defined by the appended claims.

I claim:

1. A strainer having a disc of sheet material with perforations, a spike assembly including a rigid pin secured to the underside of the disc adjacent its center, a shroud formed of an arch shaped strip extending partly around the pin and having a longitudinal contact therewith and secured at the line of contact to the pin, the said shroud being resilient whereby its marginal edges are normally spaced from the pin, the shroud being adapted to be wrapped more closely around the pin on inserting the shroud with a portion of the pin in a perforation of a permanent strainer, the resiliency of the shroud being adapted to exert an outward pressure to attach the disc to the permanent strainer, the peripheral edge of the disc being adapted to contact the inside surface of a sink or the like.

2. A strainer having a metal slightly domed disc with perforations, a resilient spike assembly including a rigid pin secured to the concave side of the disc, a resilient shroud formed of a strip of metal bent into an arch, the longitudinal center portion of the arch having a longitudinal contact with the pin and being secured thereto, the main portion of the longitudinal edges of the shroud being beveled and normally spaced from the surface of the pin, the lower end of the pin and of the strip forming the shroud having an end bevel terminating in somewhat of a point to facilitate insertion of the spike assembly in a perforation of a permanent strainer, the marginal portions of the shroud being adapted to wrap around the pin and by their resilient action securely attach the disc to a permanent strainer.

3. A strainer comprising a dome shaped disc of sheet material having perforations, a resilient strip of sheet material bent into an arch, means to attach said strip to the concave side of the disc, the said strip having a free lower end adapted for insertion in a perforation of a permanent strainer and on such insertion the radius of the arch of the strip being reduced, the strip thus exerting a substantially radial outward pressure on the permanent strainer in the perforation to thereby attach the disc to a permanent strainer.

i. A strainer as claimed in claim 3, the said resilient strip having its lower edges beveled and brought to substantially a point in alignment with the longitudinal center of the strip to thereby facilitate insertion of the resilient strip in a perforation of a permanent strainer.

5. A strainer comprising a dome shaped disc of sheet material having perforations, a solid pin secured to the disc, a resilient member extending angularly and upwardly from the lower end of the pin, the said member being compressed when the pin with the said member is inserted in the perforation of a permanent strainer of a sink or the like.

6. A strainer comprising a dome shaped disc of sheet material having perforations, a solid pin secured to the concave side of the disc, a resilient member secured to the pin and diverging laterally and upwardly from the point of the pin, the said pin with the resilient member being adapted for insertion in a perforation of a permanent strainer whereby the resilient diverging member presses against the permanent strainer at the perforation and thereby attaches the dome shaped disc to the permanent strainer.

EDGAR E. VOGT. 

